Corrugating-machine.



y G. B. JOHNSON.

CORRUGATING MACHINE. APELIOATIO'N FILED JULY 27, 1905.

"cF-icalA 7 SHEETS-SHEET 2.

/fl//f/vasusfs PATENTBD MAR. 20, 1906.

G.B.Jo111\1s01\1.` GORRUGATING MACHINE. APPLICATION I'ILED JULY 27, 1906.'

7 SHEETS-l-SHEET 3.

PATENTED MAR. 20, 1906 G. B. JOHNSON. i GORRUGATING M ACI":[IN]` APPLIOATIONFILED JULY 27, 1905.

" ,7 SHEETS-SHEET 4A Arma/v9.9

7 -hPATBNTED MAR. 20, 1906.4 G.B.JOHNSON. .GORRUGATING MACHINE.

APPL o N HL 1905.

.m wwf.;

i 41 NTNNTLD MAR. 2o, 1906. G B. JOHNSON. y l i GORRUGATING MACHINE.

' No. 315,710.I

APPLIUATION FILED JULY 27, 1905.

' 7 sHEET'sfsHBBT e.

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TTOPNEYJ UNITEDV STATES rATENT OFFICE.-

' GODFREYNBENLNGTON JOHNSON, Aor

LONDON, ENGLAND.

coRRuGATlNe-MACHINE.

i Specification of Letters Patent. Y ,Appucaiahmeaulyam 1905. seria1 N0.271,457.

I l1ra/enfasi March 2o, 1906.

This invention relates to a machine for producing a plurality vof longitudinally-ex'-v tendn The mventlon is an improvement on that g corrugations- 1n a sheet of metal.\

type of machine in which a stri' is subjected to a process of continuous col' bending be tween pairs of rolls of progressivelyvarying contours, `said machine comprisin successive pairs .of corrugating-rolls, all 'ven at the same angular veloclty and having circumferential vsalient and circumferential; re-

entering surfaces matching with one another,

the contour of the surfaces va 'ng progressively for successive pairs in suc manner that 'monly required in roofing-s and symmetrical or' otherwise and whetherwhi rgressively diminish in successive pairs of rolls, whereof the axes are set progressively closerv together. h The object ofthe Aresent invention is to enable a machine of t 's type to be emplo ed for producing shapes com rising a plurahty of reverse curves and for sheets of` cross-Seefmetal of any width to a corrugate tional form-such, for example, as is com the contour of thecorrugations be regular thelinished sheets be required to be iat or curved longitudinally.

, Accrdin' to the present invention each of therolls or'producing a number ofcorrugations or contours of reverse curvatureside by sidelin a sheet of metalcOmpSe an arbor and a series of"roll-sections in deendently y sphned thereon and normally hel a prede- .45

termineddistance apart by spring-pressure, 'each section comprising a salient portion of the roll contour and 4the sections of successive pairs of rolls beingof progressively-di# minishing .width and mounted at progress- "ively-dminishing distances apart in accord' 'ance with the progressive diminution in the effective width of the sheetl of'metaly during its passageA through the machine.y The arrangement is such that as a pair ofA rolls operate upon the sheet the sections of each roll of the pair will approach one another by slidi -cessive pairs of rol sheet will be prepared by the action of one the maximum diameters of all the rolls l remain equal the diameters probearings whic s onding bgought tobear u onthefupper half-bush a f' ing'upon, the arborin accordance with the contraction simultaneously produced in the effective width of the sheet owing to the concurrent deepening of the vcorrugation's,4 the normal distance apart of the sections of sucsbeing so adjusted that -the pair of rolls for elitlll'y between the next, succeedingl pair and thus besubjected to a gradua and continuously-progressive process of cross-bending without 'suiering from sud-` ldenor violent strains. v

. In theaccom anyin drawings, Figures 1 and 11* show afp an, an Figs.` 2 and 2A a side elevation, of amachine having six pairs of 'rolls arranged'v for producing corrugated roofing-sheets of the Ordinary type. Figi 3 isa longitudinal section of a pair of'corrugatingrolls, drawn to a 4larger scale, the sectionbeoth rolls; and Fig.' 4 is a. similarsection of a vpair of bending-rolls. Fig. 5l shows to- 75 intakenon-the` common plane Ofthe axes gether, `forpurposesof comparison, a sin le roll-section from each of the six pairs of ro ls employed in themachine illustrated in Fig. 2. I

The machinecom risesa series of consecutive pairs of rolls B. A2132, &c.,i having their main line of bite normally in a common lane which would usually beapproximately orizontal, the eni gudgeons a' of the arbors A B of the respective rolls being journaled in esheet of metal under treatmentfis fed intothe machine. A 'For this purpose the bearings are-fitted '.to slide in pairs of guides' c' in the side frames C of thev machine, each are adjustable in av direction pelplendicular to the plane ab, Fig. 2, where- 1n bearing Jfor the upper series of'. rolls A A2, &c., y

consisting of upper "and lower half-bushes aa* and4 eachfbearing for the lower series of rolls B B", v@6c-vconsisting.,ofv upper and lowerhalf-bushes b 112.," Thelower bf I.of each lower yroll Bf B2, &c., rests upon an uplright adjustable stop formed bf astud D, t eaded 'to screw intol a'block fitting in bush az.' of each u per roll Al A2, &c., rests uponthe upper. half-bush b 'ofthe correlower roll, whileelastic pressure isl of' each-,up errol by means of a powerful spring F, w 'ch takes its abutment' against a set-screw G, adjustablev through a cross-piece -g bridging the upper end of thepair ofguides c, the screw acting upon the upperk end ofthe alf-bush l the bottom of the guide c.l The lower half- -upon .a distance-b ook E, which in turn rests spring through a'plate f fitted to slide in the guides. up er roll rising during working its lower ha f-bush a2 may follow such upward movement of the'roll-gudgeon a, a comparatively light helical spring e is provided between the lhalf-bushes a2 and b', this s ring passing through a hole traversing the istance-block E from top tobottom. All the rolls of each ser1es,vupper and lower, are rotated in the same direction'and atthe,same an ularV velocity, for which purpose there are eyed on the endgudgeons a of all the rolls of the up'- per series at one sideof the machine spurwheels H of egual diameter, andvbetween the spur-wheels o each two adjacent rollsof the series are provided idle wheels I, gearing with the wheels H on either side and fitted to rotate upon stationary studs fi, carried bythe side frame C. Similarly, on the end gudgeons b of all the rolls of the lower series at the opposite side of the machine are keyed spur-wheels H .of equal diameter, between each adjacent two of which are provided idle wheels I', gearing with the wheels H on either side and tted to rotate on stationary studs i', carried by the side frame C. By this means rotary movement communicated to anyroll of the upper or lower series will be transmitted at equal angular velocity and in the same direction to the remaining rolls of 5G a l longitudinally of the corrugations.

the same series.

The studs i and i throughout the machine .may be, and those toward the delivery end of the machine are, made adjustable in the same direction as the roll-bearings, for which urpose each adjustablestud is carried by a' lock J, fitted to slide in guides 'in the side frame C of the' machine, this bloc being supported in position by being held between u per and lower set-screws K K', adjustabiie through bridge-pieces 1c 7c in the frame C. l

By. properly adjusting -the'screws D, K, and K,'a pertaining to, say, the last three 'pairs of ro s in themachine, s o as to throw their respective 'lines of bite pro essively farther out ofthe commonplane o the lines `of bite of the remaining pairs of rolls in the machine,

the sheets may e-caused to' leave the maf chine with any desired degree of curvature y Each of the rolls A` A, lcc., or B B2, &c., of either series, upper or lower, is formed of a number of-sections 1A 2A 3A, &c., IAE-2A2 3A, &c., or 1B 2B 3B,.&c. 1B3 2B2 3B2, &c., inde endently splined upon the middle ortion o the corresponding roll-arbor A or for which purpose th/e arbor maybe of octagonal (or other. convenient angular) vform in cross-section, the aperture in each roll-section beingrnade to fit and slide easily upon the arbor. Adjacent sections are forced apart4 by means of springs L, coiled in recesses provided in the opposed faces of the sections, the entry ofldirt andrg'rit into the In order that in the event of the` the machine there tiall -extending salient portion y matching with recesses being prevented by means of sleeves l, which make a sliding iit in the opposed recesses of adjacent sections, as indicated. The normal position or distance apart of the sections is determined by a stop or stops M for each section, said stops being formed upon the arbor or fixed thereto-as, for example, in the manner indicated-and being adapted, while limiting the distance to which one roll-section is forced apart from the next by the action of the springs, to permit adjacent sections to approach one another as ar as maybe necessar when the rolls are in op.-

eration, as hereina ter described.

in order to rovide an abutment or datum plane from w 'ch the action of each pair of `rolls may take effect, a single section of one member of each pair of rolls is made a fixture on its arbor, the correspondin section of the same member (upper or lower bein fixed 1n the case of each pair of rolls throug out the machine. As a rule, and particularly in cases (such as that ofthe exam le chosen) of rolling ordinary plain or regular y-corru ated sheets, it is preferred to make the centra section of one member-say the lower-of each pair of rolls a fixture upon its arbor,l as indicated in Fig. 3, which is a longitudinal seetion of the second pairA2 B2 of the rolls shown in Fig. 1 and wherein the central roll-section 7B2 of the lower roll B2 of that pair is a fixture upon its arbor B. In consequence of this arrangement asa sheet passes through will be a tendency for its lon itudinal center line to remain centrally of t e width'of all the rolls, the contraction of the sheet (due to the gradual deepenin of the corrugations) taking effect from eac edge of the sheet toward its center line and having for effect to cause the sliding roll-sections to approach the fixed section in d position to the pressure of the springs. -rollsection other than the central section ma however, bemade fast on the arbor, accor ing to the contour to be produced, and in any case when the roll comes into operation the slidi roll-sections would be caused to approal `the fixed section from one' or both sides, accgrdingto therelative position of said fixed' section, the amount of such sliding movement increasing of course with the distance of each sliding section from the section which is afixture.

Each roll-section comprises a circumfereny of the roll contour, said salient portion and enterin to a corresponding depth a circumferentia ly-extending grooved or reentering portion z of the other roll of the pair, rentering portion z being formed artl 1neach of two adjacent sections of 'sai rol so that the sections of the two rolls of a pair break joint with one another, as shown in Fig. 3.` Those salient portions which c orre spend with one another in successive pairs ofl this' ait-,71o

rolls are ofthe same diameter throughout the machine, lso that as all the rolls are driven at the saine `angular velocity their salient portions of maxi-mum diameterV have ane ual surface'v velocity throughout the machine.

The shaped profile constituted by the alterf between the portions 'y and e is least tothey final form wherein such difference is greatest, each pair of rolls performin .an e ual or a share oft ewor from t e.

iiatingL salient portions 'y and renteringportions z of the rolls i's varied progressively for.

successive pairs of rolls, the variation of profile progressing.- by easy stages from the initial form wherein the' difference in diameter proximately e ua inception to t e completion of shape to be imparted` to 'the sheet. Owing,

' therefore, to the factthat vthe salient portions y 'of maximum-diameterfare equal india-me minimum diameter. Assuming the end gudgeons a and b o f the upper and lowerseries of rolls to *sive pairs are set progressivel fcloser terfor all the rolls throughoiit 'the machine, as before Stated, the renterin portions z of minimum diameter graduallyI i'ininish in diameter for the rolls of' successive pairs, and consequently the axes of thefrolls of succestogether in correspondence with suc diminution of be of equal diameter throughout the machine and all the Ihalf-bushes a2 or b of the roll-bearings of either series to'be interchangeable, `-the distance-blocksE, whereby the half-bushes a* b" ward at the same speed b -all its entrance into the macliin y, therefrom and is not subjected to eitherl ten- (and consequently the journals of the roll-arbors) are. held apart, are made of progressively-diminishing height, as indicated, s o as to permit of theabovementioned progressive i approach of thfe? axes of the two rolls in suc' cessive airsx The height of said distanceblocks is sueh that the distance maintained between Vthe surfaces of the rolls 4of each pair'is equal throughout thel machine'v and ,so much greater than the thickness of tlie sheet operated on that thel latter will not be nipped etween the salient portions y of the one roll and th/eientering portions z of the other roll of a pair, but will contact only or i sile .or buckling strainsiin thefdirectionof its length while under treatment.

' The roll-sections of successive pairs of rolls i are of progressively-diminishing width (lon-4 'gitudinally of the roll axesto extents proportional to the progressive 'increase inthe' depth land' diminution in vthe .widthfof the corrugations produced by the rolls and to the consequent the requiredprogressive diminution-in the effective widt 'of the sheet Ofmetalduring its passage through thefmachin'e, and the stops- 'the example M, whereby the minimum distances between the adjacent sections of a roll are determined,

apre set in such positions as tocause the rollsections of successive pairs of rolls to be normally held apart at distances -which corre-i i spondingly diminishprogressively. As the s eet of metal asses between Athe rolls ofa pair the severa sections of each roll will be caused to slide longitudinally of the arbor in opposition to thepressure of the springs L,so as to approach that roll-section which is fast on the arbor, the extent of such sliding movewith the distance of individual rollsections from that section which is fast on the arbor) being in accordance with the contraction simultaneously produced in the effective width" ofthe sheet, owing to the con- .current deepje-sliliingl of the corrugations, and

the diminis stances whereatthe several sections of a roll are 'normally held apart by thestops M in successive pairs of rolls will have for eect to cause the sheet to be pre- ,pared by the action of one pair of rolls for entry between the rolls of the next succeedin pair, so that the'sheet o f metal 'will be su jectedV to, a gradual and continuously- \m`ent (which will, as before stated, increase progressive processof reverse bending transversely of its width without being caused to `Suffer from the injurious strains which would lbe produced by sudden or violent distortions.

In order to 'more' effectually iinishthe metal sheet and better'insure uniformity inthe contour of the corrugations throughout'the whole length of the sheet, it is preferred'to make the last two (or more) pairsof rolls (as A5- B5 and IOO AGB" in the example illustrated) Aat the delivery end of the machine identical in form.

Guides maybe providedv whereby the lateral mar ofthe metal sheet under treatment of rolls for entry etweenthe next succee pair and for insuring the sheet maintaining a straight vcourse in its vpassage through the,

machine. Such guides may consist, as indicatedin Fi. 1, o

versely of t e eneral plane of the sheet under treatment an carried vby brackets O, proj ecting' inward from'the side frames O ofthe be prepared after leaving one (panir t i g IIO airs of antifriction-rollers N, mounte to turn at opposite sides of the machine upon spindles n, extending trans-` machine intermediate between 'successive pairs of lshaping-rolls, the s indlesl n-being adjustable in slots o, extending transversely of themachine.. in the brackets '0, so as to enable thedist'ance between the guide-rollers 'N at oprposite'sidesof the machine to be adjuste under treatment;

Rotation is communicated in the first in stance, preferably, to a pair of rolls about midway in the len th ofthe machine, m'otion (in ustrated) being transmitted from. a driving-shaft revolving at a relativelyhigli' speed an having a heavy .fly-

to suit the width of the metal sheet wheelrP, througha 4toothed inion gon said shaft to a large gearwheel 'on a countershaft r, a pinion R, on which, gears with the 'the remaining rolls) of the upper series as well, the u-pper roll A3l of the pair havin a toothed wheel S, fast on the opposite en of its arbor to the wheel H, previously described, this wheel S on the roll A3 gearing with the wheel H on the roll B3.

When the sheet of metal under treatment is to be not only corrugated, as described, but

' also bent longitudinally, it is necessary (before proceeding to the bending operation,

which is performed, as before mentioned, by

the terminal rolls, such as A5 lil5 A BfV of themachine) to form the corrugations of a de th somewhat greater and of a width some w at less than is ultimately required, so as by making'pro er allowance for the increase in width and ecrease in depth of the corrugations, which occurs when the sheet is after.- ward bent longitudinally,'to insure that the corrugations shall eventually be of the width and deplth required, such allowance increasing wit the increase in vthe degree of longitudinal curvature to bel given to the sheet.

. In consequence of such Widening of the corrugations during the bending operation` it is necessary in the .case of those terminal rolls,

such as A5 B5 A6 B6, whereby the sheet is bent after bein corrugated, to provide 'for the sliding rol -sections receding from the fixed sectioninstead of approaching the latter, as

before described with reference to the corrugating-rolls. Accordin ly, as shown-in Fig. 4, in the case of the ben `ngrolls the position 0i' the stops M relatively to the roll-sections is reversed Jfrom that occupied by the stops M in the case of the corrugating-rolls, as

, shown in Fig. 3, so that whereas in the corrugating-rolls, Fig.

3 each spring L normally thrusts that rol to iton its outer side in a direction awayfrom theV fixed roll-section of the same or the other member of the pair of rolls in' the bendingrolls, Fig. 4, eac spring L normally thrusts that roll-section which is contiguous to it on itsinner side -in a direction toward thebixed roll-section of the same or the other member of the pair of rolls.` Hence inthe caseof the bending-rolls, Fig. 4, those springs L whereby the outermost roll-sections are normally-4 thrust inward against the corres ending stops M require to beprovidedfwit abutments in the form lof collas t,-xed on the -res ective arbors, and the said4 outermost rol -sectionscarry sleeves l similar to those,

l,p'revio`usly described, but each' adapted to slide over and make joint with the periphery of the corresponding collar t, as indicated.

reckoning from the sprins 0 section which 1s contiguousiavio A It is to be' observed that in the case of each corrugating or shaping roll successive springs L require to be of rogressively-dimimshing strength reckoningl omr the s rings at either side of the fixed ro -section (7 2 in the example illustrated in Fig. 3') of the one member of the pair of rolls or from the spring L which separates those roll-sections of the other member of the pair which coperate with said ixed roll-section, the ratio between the strengths of successive springs in each roll being such as to permit of all the slidin roll-sections m oving inward along their aror to proportionate extents when the roll comes into operation upon the sheet, so as to produce or deepen the corrugation. Conversely in the case of each bendmg-roll successive springs L require b to be of progressively-increasin strength, at eit er side of the xed roll-section (7 in the example illustrated in Fig. 4) of the one member of the pair of rolls or from the sprin L', which separates those roll-sections o the other member of the pair which co 'erate with said iixedroll-section, the ratio etween the strengths of successive s rings in each roll being such asfto permit 0 all the sliding rollsections moving outward alon their arbor to proportionate extents when t e roll comes into operation upon the corrugated. sheet, so as to end the same lon itudinall It' is to be clearly uncerstood tliat neither the number of corrugating or shaping rolls nor the number of terminal or bending rolls (if any of the latter be employed) is in any way hmited to the number shown in the exeither kind may be employed, according to the nature or con uratlon of the section to be produced and t e degree of longitudinal curvature (if any)` given to the sheet.

i claim- 1. A inachine'for producing a plurality oi longitudinally'- extending corrugations 1n a sheet of metal, consisting essentially in the combination with successlve pairs of roll-arbors all positively rotated at the same anguroo 4ample illustrated, as any number of rolls of v IIO larvelocity, of a lurality of independent roll- M sections c rried y and rotatab e with each of said arqrs andseparated from one an- .other by a ,'elding medium, each roll-section comprising a circumferential salient portion ada ted to match with the conversely-sha ed su aces or the coactin sections of the ot er roll of the pair, the'wi th of the roll-sections diminishin progressively -in Asuccessive pairs of rollsan the contours oi' the roll-sections varying progressively for successive airs of rolls but themaximum diameterso all the roll-sections being equal while the minimum diameters progressively diminish for successivepairs of rolls, whereof the axes are set progressivelycloser together, substantially as specified. v

2. In a machine for producing a plurality of longitudinally-extendingcorrugations in a sheet of metal, the combination with successive pairs of roll-arbors, of a plurality of in dependent roll-sections carried by and ro.- tatable vwith each of said arbors, the widths ofthe roll-sections diminishing progressively 1n successlve-palrs of rolls and a single section 1n one member ofea'ch pair ofrolls being fixed on its arbor while the remaining sections are arranged to slide but not to turn on their arbors; springs interposedl betweenthe adj acent sections of each roll,-.successiveksprings in a roll being of progessively-dirnimshing strength reckoning from the iiXed roll-section to the sections farthest thereromv on either side; and stops on the roll-arbors adapted to limit the distances from said Afixed roll-section adapted -cessive pairs of rolls,

tion tol which the other roll-sections are forced by the springs, said distances dimmishing progressively in successive airs of rolls 1n accordance with the progressive diminution in the widths of the roll-sections, substantially as speciiied. l

l3. Ina machine for roducing aplurality of longitudinally-exten ing corrugations in a sheet of metal, consisting essentially of pairs v of roll-arbors positively rotated and series of independent roll-sections carried thereby -and rotatable therewith, each roll-section -blo'cks disposed perpendicularly to the plane 1n which the sheet of metal is fed between therolls,- means for applying regulable elastic pressure to the bearing-blocks of the upper arbor of each pair, andl distance-blocks interposed between the up er and lower bearing-blocks -of each pair oFarbors, adapted to maintain between the axes of each pair of arbors a minimum distance progressivel di` minishing for successive a1rs`m accor ance with the progressive diminution in th/e minimuml diameter of the lsections of successive pairs of rolls and to maintain between the surfaces of the upper and lower members of each pair of rolls a minimum distance greater than the thickness of the sheet of' metal urider treatment, substantially as specified.

4.. A machine forproducing a plurality of llongitudinally'-extending. corrugations inl a -sheet of metal consisting essentially of suc' cessive pairs of shaping-rolls constituted by roll-arbors all positively rotated at the same angular velocity and a plurality of independ- 'ent roll-sections mounted on` and rotatable with each of said arbrs and separated rom to matchwith the conversely-l oning ments, and stops on each roll-arbor adapted i der the one another by 'a yielding -mediumgeach r'ollseetion comprising a circumferential salient portion adapted to match with 'the con versely-shaped surfaces of the coacting sections of the other roll of a pair, the contours of the roll-sections varying pro ressively for Asuccessive pairs of rolls, and t e widths of the rollsections diminishing progressively in successivevpairs of rolls; in combination with pairs of lateral guide-rollersfor the edges of the sheet of metal under treatment, mounted to rotate intermediate of successive pairs of shaping-rolls on axes at right angles to those of the shaping-rolls, the guide-rollers of suc` cessive airs being set at progressively-diminishing istances apart in accordance with the l progressively-diminishing width of the sheet of metal in its passage through the machine, substantially as s ecified.

5. A machine or producing a plurality of longitudinally extending corrugations in' a sheet of metal and for bending said sheet longitudinally of the corru ations when produced,l consisting essentially in the combination with successive pairs of corrugatin rolls of successivel pairs of bending-rol sadapted to 'receive the sheet of metal from the vcorrugating-rolls, and means for enabling the axes of the bending-rolls to be adjusted in a direction per endicular to the plane wherein the sheet oi)metal is fed between th'e corrugatin rolls; the corrugating-rolls' being constitute essentiall by the combination with .arbors in pairs all positively rotated at the same angular velocity, of series of independent roll-sections carried by and rotatale with each of said arbors and separated from one anotherby a yielding medium, land ,A all having the same maximum diameter; and the bending-.rolls being constituted by the combination with arbors in pairs all positively rotated at the same angular velocit IOO as those of the corrugating-rolls, of a plura y ity of inde endent roll-sections carried by and rotatabl e with each of said arbors, all the roll-sections having the same maximum diameter as the sections oithe corrugating-` olls and a single section in one member of each pair of rolls being fixed on its arbor while the remaining sections are arranged to slide'bu't not to turn on their arbors, springs inter osed etween the adjacent roll-sections and betwe n the extreme rsections of each roll and abutments fixed toward the ends of the roll-arbors, successive springs inl a roll be- IIO ing of rogressively-increasing strength reckom/the flXedroll-section to said abutto limit theapproach toward the iixed rollsection of the other roll-*sections of a pair unressure of the springs, substantially as speci ed. v

Y 6. Ina machine for producing a plurality of longitudinally-extendin corrugations in a' g said sheet lonf sheet of metal-and for ben vof metal is fed between the corrugatin -rolls ;A

itudinally of the corrugations when prouced, consisting .essentially of successive pairs of corrugating-rolls positively rotated,

successive pairs ofl bending-rolls adapted to receive the sheet of metal from the corrugat- 'iIig-rolls, and means for enabling the axesof the bendir-rolls to be adjusted in a direction perpendic ar to the plane wherein the sheet the combination .of'beaI'ing-blocks or-the journals oflthe arbors of the bending-rolls,

guides for said bearin-iblocks disposed normally to the plane in W is fed between the rolls, means for applying elastic pressure to the bearingfblocks of the Y upper roll of each pair, vdistance-blocks infast on the arbors terposed between the upper and lower bearing-blocks of each pair of rolls, gear-wheels the .upper and lower sej ch the sheet of metal "ries 'of bending-rolls at the opposite ends zo thereof respectively, idle wheels intermediate between and gearing with the gear-wheels of the adjacent rolls of each series, blocks for,

sup rting the axes of said idle. wheels,

es for said blocks disposed normally to 2 5 gui fthe plane in which the sheet of metal is fed between the rolls, means for adjusting in y GODFREYBENINGTON JoHNsoN. Witnesses:

GEORGE E. MINTERN,

' RICHARD MORGAN. 

